Hammock stand



FIG. 1 is a perspective view of a hammock stand showing my new design;

FIG. 2 is a front elevation view thereof, the rear elevation view being identical;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevation view thereof, the opposite side being identical; and,

FIG. 6 is a perspective view thereof, the broken lines are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a hammock stand, as shown and described. 